CN115883010A - Communication method, device and system - Google Patents

Abstract

The embodiment of the application discloses a communication method, a communication device and a communication system.A first communication device sends PPDU (protocol data Unit) comprising indication information and M link self-adaptive blocks to a second communication device, wherein the indication information indicates resources used for link self-adaptation, the M link self-adaptive blocks use different transmission parameters, the resources are used for transmitting the M link self-adaptive blocks, and the second communication device returns a feedback result determined according to measurement results corresponding to the M link self-adaptive blocks to the first communication device, so that the first communication device sends the PPDU used for transmitting data according to the feedback result. Therefore, two communication devices can complete link adaptation through one-time interaction without multiple interactions, and the link adaptation efficiency can be improved.

Description

A communication method, device and system

Technical Field

The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method, device and system.

Background Art

Link adaptation technology refers to the behavior of the system adaptively adjusting the system transmission parameters according to the currently acquired channel information, in order to overcome or adapt to the impact of the current channel changes. At present, in a wireless local area network (WLAN), an access point (AP) can first use a value of a transmission parameter for transmission, and then adjust the value of the transmission parameter according to information such as whether an acknowledgment (ACK) frame is received for the above transmission, and the packet error rate of the above transmission. In the above method, it may take multiple interactions to converge the transmission parameters, thereby reducing the efficiency of link adaptation.

Summary of the invention

The embodiments of the present application disclose a communication method, device and system for improving link adaptation efficiency.

A first aspect discloses a communication method, which can be applied to a first communication device or a module (e.g., a chip) in the first communication device. The following description is made by taking the application to the first communication device as an example. The first communication device can be an AP or a station (STA). The communication method can include:

The first communication device sends a first physical layer protocol data unit (physical protocol data unit, PPDU), the first PPDU includes indication information and M link adaptation blocks, the indication information indicates resources used for link adaptation, the M link adaptation blocks use different transmission parameters, the resources are used to transmit the M link adaptation blocks, M is an integer greater than or equal to 1; the first communication device receives a feedback result, and the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In an embodiment of the present application, a first communication device can send multiple link adaptation blocks in one PPDU, and different link adaptation blocks use different transmission parameters, so that a second communication device that receives this PPDU can measure different transmission parameters at one time, and can return better feedback results based on the measurement results. Since the two communication devices can complete link adaptation through one interaction and do not need to interact multiple times, the link adaptation efficiency can be improved. In addition, since the number of information transmissions is reduced, transmission resources can be saved. Furthermore, since the PPDU indicates the resources used for link adaptation, the second communication device can receive and measure on the indicated resources, and can accurately receive the link adaptation block used for link adaptation, which can improve the measurement accuracy and reduce the power consumption of the second communication device.

As a possible implementation manner, the communication method may further include:

The first communication device sends a second PPDU according to the feedback result.

In an embodiment of the present application, after the first communication device receives the feedback result, it can send a second PPDU according to the feedback result, so that the second PPDU uses appropriate transmission parameters, thereby improving system performance.

As a possible implementation, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field (userfield), the Punctured Channel Information field (Punctured Channel Information field) in the universal signaling field (U-SIG), the resource unit (RU) allocation subfield (RU allocation subfield), the bitmap (bitmap) and the modulation and coding scheme (MCS) index. The first bit can be a validation bit (validate bit) or an ignore bit. The bitmap can be carried in the U-SIG or in the extremely high throughput signal field (EHT-SIG). The STA-ID included in the first user field is a specific STA identifier (identifier, ID). The MCS is not available in the orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA) transmission mode.

In an embodiment of the present application, information in the existing PPDU can be used to indicate resources for link adaptation without changing the structure of the existing PPDU, thereby improving the compatibility of the PPDU.

As a possible implementation manner, the bit map may indicate whether the frequency band indicated by each bit in the bit map is used for link adaptation or for data transmission.

In the embodiment of the present application, the bitmap can not only indicate that the PPDU is used for link adaptation, but also indicate the resources used for link adaptation and the resources used for data transmission. It can be seen that multiple indications can be implemented through one bitmap, which can improve information utilization.

As a possible implementation, in the case where the resource corresponds to an RU, the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU.

In an embodiment of the present application, since the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU, the other user fields following the first user field in the user field corresponding to the RU can be interpreted as user fields for link adaptation, thereby avoiding interpreting the user field for data transmission as a user field for link adaptation, or interpreting the user field for link adaptation as a user field for data transmission.

As a possible implementation manner, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information and measurement accuracy information.

In the embodiment of the present application, the first user field can not only be used to indicate resources used for link adaptation, but also include common information of different users, thereby improving resource utilization.

As a possible implementation, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

In the embodiment of the present application, the user field corresponding to the communication device actually used for link adaptation in the PPDU is the second user field in the user field corresponding to the RU except the first user field. It should be understood that the specific STA-ID included in the first user field is not the STA-ID indicating different types of communication devices specified in the existing communication protocol, and it can be understood that the STA-ID is a STA-ID not defined in the existing protocol.

As a possible implementation manner, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

In an embodiment of the present application, a suitable modulation and coding level can be obtained through MCS measurement, a suitable beam direction can be obtained through beamforming measurement, the measurement accuracy and efficiency can be improved through the measurement sequence, the suitable number of streams can be obtained through spatial stream measurement, and the suitable transmit power can be obtained through power measurement.

A second aspect discloses a communication method, which can be applied to a second communication device or a module (e.g., a chip) in the second communication device. The following description is made by taking the application to the second communication device as an example. The second communication device can be an AP or a STA. The communication method can include:

The second communication device receives a first PPDU, where the first PPDU may include indication information and M link adaptation blocks, where the indication information indicates resources used for link adaptation, the M link adaptation blocks use different transmission parameters, and the resources are used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The second communication device sends a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In an embodiment of the present application, after the second communication device receives the PPDU for link adaptation, it can measure different transmission parameters at one time, and can return better feedback results based on the measurement results. Since the two communication devices can complete link adaptation through one interaction, there is no need for multiple interactions, so the link adaptation efficiency can be improved. In addition, since the number of information transmissions is reduced, transmission resources can be saved. Furthermore, since the PPDU indicates the resources for link adaptation, the second communication device can receive and measure on the indicated resources, and can accurately receive the link adaptation block for link adaptation, which can improve the measurement accuracy and reduce the power consumption of the second communication device.

As a possible implementation manner, the communication method may further include:

The second communication device measures the M link adaptation blocks through the resource;

The second communication device determines a feedback result according to the measurement result.

In an embodiment of the present application, the second communication device can first measure M link adaptation blocks, and then determine the feedback results based on the measurement results, so as to ensure that the feedback transmission parameters are transmission parameters with better effects, so that the first communication device can subsequently use the feedback results to send PPDU, thereby improving system performance.

As a possible implementation, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field, the perforation channel information field in the U-SIG, the RU allocation subfield, the bitmap, and the index of the MCS. The first bit can be a verification bit or an ignore bit. The bitmap can be carried in the U-SIG or in the EHT-SIG. The STA-ID included in the first user field is a specific STA-ID, and the MCS is not available in the OFDMA transmission mode.

In an embodiment of the present application, information in an existing PPDU can be used to indicate resources for link adaptation without changing the structure of the existing PPDU, thereby improving the compatibility of the PPDU.

As a possible implementation manner, the bit map may indicate whether the frequency band indicated by each bit in the bit map is used for link adaptation or for data transmission.

In the embodiment of the present application, the bitmap can not only indicate that the PPDU is used for link adaptation, but also indicate the resources used for link adaptation and the resources used for data transmission. It can be seen that multiple indications can be implemented through one bitmap, which can improve information utilization.

As a possible implementation, in the case where the resource corresponds to an RU, the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU.

In an embodiment of the present application, since the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU, the other user fields following the first user field in the user field corresponding to the RU can be interpreted as user fields for link adaptation, thereby avoiding interpreting the user field for data transmission as a user field for link adaptation, or interpreting the user field for link adaptation as a user field for data transmission.

As a possible implementation manner, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information and measurement accuracy information.

In the embodiment of the present application, the first user field can not only be used to indicate resources used for link adaptation, but also include common information of different users, thereby improving resource utilization.

As a possible implementation, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

In the embodiment of the present application, the user field corresponding to the communication device actually used for link adaptation in the PPDU is the second user field in the user field corresponding to the RU except the first user field. It should be understood that the specific STA-ID included in the first user field is not the STA-ID corresponding to the communication device.

As a possible implementation manner, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

In an embodiment of the present application, a suitable modulation and coding level can be obtained through MCS measurement, a suitable beam direction can be obtained through beamforming measurement, the measurement accuracy and efficiency can be improved through the measurement sequence, the suitable number of streams can be obtained through spatial stream measurement, and the suitable transmit power can be obtained through power measurement.

A third aspect discloses a communication method, which can be applied to a first communication device or a module (e.g., a chip) in the first communication device. The following description is made by taking the application to the first communication device as an example. The first communication device can be an AP or a STA. The communication method can include:

The first communication device sends a first frame, where the first frame is used to indicate resources used for link adaptation in the PPDU;

The first communication device sends a first PPDU, the first PPDU includes M link adaptation blocks, the M link adaptation blocks use different transmission parameters, the resource is used to transmit the M link adaptation blocks, and M is an integer greater than or equal to 1.

In an embodiment of the present application, before sending a PPDU, the first communication device may first indicate that the PPDU is used for link adaptation through a frame, and then send multiple link adaptation blocks in the PPDU, and different link adaptation blocks use different transmission parameters, so that the second communication device receiving the PPDU can measure different transmission parameters at one time, and can return better feedback results based on the measurement results. Since the two communication devices can complete link adaptation through one interaction, there is no need to interact multiple times, so the link adaptation efficiency can be improved. In addition, since the number of information transmissions is reduced, transmission resources can be saved. Further, since the first frame indicates the resources used for link adaptation, the second communication device can receive and measure on the indicated resources, and can accurately receive the link adaptation block used for link adaptation, which can improve the measurement accuracy and reduce the power consumption of the second communication device. In addition, since the first frame is sent first and the first PPDU is sent later, the second communication device can receive the first frame first, so that it can prepare for measurement based on the first frame before the first PPDU arrives, thereby improving the measurement efficiency.

As a possible implementation manner, the communication method may further include:

The first communication device receives a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks;

The first communication device sends a second PPDU according to the feedback result, where the second PPDU is used for data transmission.

In an embodiment of the present application, after the first communication device receives the feedback result, it can send a second PPDU according to the feedback result, so that the second PPDU uses appropriate transmission parameters, thereby improving system performance.

As a possible implementation, the first frame may include a station information field (STAinformationfield), the station information field may include a partial bandwidth information subfield (partialbandwidthinformation field), and the partial bandwidth subfield may indicate resources used for link adaptation by the station corresponding to the station information field.

In an embodiment of the present application, the first communication device can indicate the resources used for link adaptation of the corresponding site through the partial bandwidth information subfield included in the site information field in the first frame, and can indicate the site that requires link adaptation, thereby avoiding the situation where the site that does not need link adaptation thinks that link adaptation is needed.

As a possible implementation, the first frame may include a common field, and the common field may indicate resources used for link adaptation in the PPDU.

In an embodiment of the present application, when multiple sites require link adaptation, the common field in the first frame can be used for indication, which can reduce the amount of indication information, thereby saving transmission resources and improving information utilization.

As a possible implementation manner, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

In an embodiment of the present application, when the first frame has indicated the resources used for link adaptation in the PPDU, the RU allocation subfield in the PPDU may no longer be indicated, that is, the user field corresponding to this RU allocation subfield is 0, which can save overhead and avoid new signaling design in the PPDU.

A fourth aspect discloses a communication method, which can be applied to a second communication device or a module (e.g., a chip) in the second communication device. The following description is made by taking the application to the second communication device as an example. The second communication device can be an AP or a STA. The communication method can include:

The second communication device receives a first frame, the first frame indicating resources for link adaptation in the PPDU;

The second communication device receives a first PPDU, where the first PPDU includes M link adaptation blocks, where the M link adaptation blocks use different transmission parameters, and the resource is used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The second communication device sends a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In an embodiment of the present application, after the second communication device receives the first frame, it can measure different transmission parameters at one time, and can return better feedback results based on the measurement results. Since the two communication devices can complete link adaptation through one interaction, there is no need for multiple interactions, so the link adaptation efficiency can be improved. In addition, since the number of information transmissions is reduced, transmission resources can be saved. Furthermore, since the first frame indicates the resources used for link adaptation, the second communication device can receive and measure on the indicated resources, and can accurately receive the link adaptation block used for link adaptation, which can improve the measurement accuracy and reduce the power consumption of the second communication device. In addition, since the second communication device can receive the first frame first, it can prepare for measurement based on the first frame before the first PPDU arrives, thereby improving the measurement efficiency.

As a possible implementation manner, the communication method may further include:

The second communication device measures the M link adaptation blocks through the resource;

The second communication device determines a feedback result according to the measurement result.

In an embodiment of the present application, the second communication device can first measure M link adaptation blocks, and then determine the feedback results based on the measurement results, so as to ensure that the feedback transmission parameters are transmission parameters with better effects, so that the first communication device can subsequently use the feedback results to send PPDU, thereby improving system performance.

As a possible implementation, the first frame may include a site information field, the site information field may include a partial bandwidth information subfield, and the partial bandwidth subfield may indicate resources used for link adaptation by the site corresponding to the site information field.

In an embodiment of the present application, the first communication device can indicate the resources used for link adaptation of the corresponding site through the partial bandwidth information subfield included in the site information field in the first frame, and can indicate the site that requires link adaptation, thereby avoiding the situation where the site that does not need link adaptation thinks that link adaptation is needed.

As a possible implementation, the first frame may include a common field, and the common field may indicate resources used for link adaptation in the PPDU.

In an embodiment of the present application, when multiple sites require link adaptation, the common field in the first frame can be used for indication, which can reduce the amount of indication information, thereby saving transmission resources and improving information utilization.

As a possible implementation manner, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

In an embodiment of the present application, when the first frame has indicated the resources used for link adaptation in the PPDU, the RU allocation subfield in the PPDU may no longer be indicated, that is, the user field corresponding to this RU allocation subfield is 0, which can save overhead and avoid new signaling design in the PPDU.

A fifth aspect discloses a communication device, which may be a first communication device or a module (for example, a chip) in the first communication device. The communication device may include:

a sending unit, configured to send a first PPDU, the first PPDU including indication information and M link adaptation blocks, the indication information indicating resources used for link adaptation, the M link adaptation blocks using different transmission parameters, the resources being used to transmit the M link adaptation blocks, and M being an integer greater than or equal to 1;

The receiving unit is used to receive a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

As a possible implementation manner, the sending unit is further configured to send a second PPDU according to the feedback result.

As a possible implementation, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field, the perforation channel information field in the U-SIG, the RU allocation subfield, the bitmap, and the index of the MCS. The first bit can be a verification bit or an ignore bit. The bitmap can be carried in the U-SIG or in the EHT-SIG. The STA-ID included in the first user field is a specific STA-ID, and the MCS is not available in the OFDMA transmission mode.

As a possible implementation manner, the bit map may indicate whether the frequency band indicated by each bit in the bit map is used for link adaptation or for data transmission.

As a possible implementation, in the case where the resource corresponds to an RU, the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU.

As a possible implementation manner, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information and measurement accuracy information.

As a possible implementation, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

As a possible implementation manner, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

A sixth aspect discloses a communication device, which may be a second communication device or a module (e.g., a chip) in the second communication device. The communication device may include:

A receiving unit, configured to receive a first PPDU, the first PPDU including indication information and M link adaptation blocks, the indication information indicating resources used for link adaptation, the M link adaptation blocks using different transmission parameters, the resources being used to transmit the M link adaptation blocks, and M being an integer greater than or equal to 1;

The sending unit is used to send a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

As a possible implementation manner, the communication device may further include:

a measuring unit, configured to measure the M link adaptation blocks using the resource;

The determination unit is used to determine the feedback result according to the measurement result.

As a possible implementation, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field, the perforation channel information field in the U-SIG, the RU allocation subfield, the bitmap, and the index of the MCS. The first bit can be a verification bit or an ignore bit. The bitmap can be carried in the U-SIG or in the EHT-SIG. The STA-ID included in the first user field is a specific STA-ID, and the MCS is not available in the OFDMA transmission mode.

As a possible implementation manner, the bit map may indicate whether the frequency band indicated by each bit in the bit map is used for link adaptation or for data transmission.

As a possible implementation, in the case where the resource corresponds to an RU, the first user field is located in the first user field in the user field corresponding to the RU, and the user field corresponding to the RU is located in the content channel corresponding to the RU.

As a possible implementation manner, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information and measurement accuracy information.

As a possible implementation, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

As a possible implementation manner, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

A seventh aspect discloses a communication device, which may be a first communication device or a module (for example, a chip) in the first communication device. The communication device may include:

A sending unit, configured to send a first frame, where the first frame is used to indicate resources used for link adaptation in the PPDU;

The sending unit is also used to send a first PPDU, the first PPDU includes M link adaptation blocks, the M link adaptation blocks use different transmission parameters, the resource is used to transmit the M link adaptation blocks, and M is an integer greater than or equal to 1.

As a possible implementation manner, the communication device may further include:

A receiving unit, configured to receive a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks;

The sending unit is further used to send a second PPDU according to the feedback result, and the second PPDU is used for data transmission.

As a possible implementation, the first frame may include a site information field, the site information field may include a partial bandwidth information subfield, and the partial bandwidth subfield may indicate resources used for link adaptation by the site corresponding to the site information field.

As a possible implementation, the first frame may include a common field, and the common field may indicate resources used for link adaptation in the PPDU.

As a possible implementation manner, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

An eighth aspect discloses a communication device, which may be a second communication device or a module (for example, a chip) in the second communication device. The communication device may include:

A receiving unit, configured to receive a first frame, the first frame indicating resources for link adaptation in the PPDU;

The receiving unit is further used to receive a first PPDU, where the first PPDU includes M link adaptation blocks, the M link adaptation blocks use different transmission parameters, and the resource is used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The sending unit is used to send a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

As a possible implementation manner, the communication device may further include:

a measuring unit, configured to measure the M link adaptation blocks using the resource;

The determination unit is used to determine the feedback result according to the measurement result.

As a possible implementation, the first frame may include a site information field, the site information field may include a partial bandwidth information subfield, and the partial bandwidth subfield may indicate resources used for link adaptation by the site corresponding to the site information field.

As a possible implementation, the first frame may include a common field, and the common field may indicate resources used for link adaptation in the PPDU.

As a possible implementation manner, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

The ninth aspect discloses a communication device. The communication device may include a processor, which is used to enable the communication device to implement the communication method disclosed in the first aspect or any embodiment of the first aspect, or to enable the communication device to implement the communication method disclosed in the third aspect or any embodiment of the third aspect. Optionally, the communication device may also include a memory and/or a transceiver, and the transceiver is used to receive information from other communication devices outside the communication device, and output information to other communication devices outside the communication device. When the processor executes the computer program stored in the memory, the processor executes the communication method disclosed in the first aspect or any embodiment of the first aspect, or the processor executes the communication method disclosed in the first aspect or any embodiment of the first aspect.

The tenth aspect discloses a communication device. The communication device may include a processor, which is used to enable the communication device to implement the communication method disclosed in the second aspect or any embodiment of the second aspect, or to enable the communication device to implement the communication method disclosed in the fourth aspect or any embodiment of the fourth aspect. Optionally, the communication device may also include a memory and/or a transceiver, and the transceiver is used to receive information from other communication devices outside the communication device, and output information to other communication devices outside the communication device. When the processor executes the computer program stored in the memory, the processor executes the communication method disclosed in the second aspect or any embodiment of the second aspect, or the processor executes the communication method disclosed in the fourth aspect or any embodiment of the fourth aspect.

The eleventh aspect discloses a communication system, which includes the communication device of the ninth aspect and the communication device of the tenth aspect.

The twelfth aspect discloses a computer-readable storage medium, on which a computer program or computer instructions are stored. When the computer program or computer instructions are executed, the communication method disclosed in the above aspects is implemented.

A thirteenth aspect discloses a chip, comprising a processor for executing a program stored in a memory, and when the program is executed, the chip executes the above method.

As a possible implementation, the memory is located outside the chip.

A fourteenth aspect discloses a computer program product, which includes a computer program code. When the computer program code is executed, the above-mentioned communication method is executed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an MU PPDU disclosed in an embodiment of the present application;

FIG2 is a schematic diagram of a TB PPDU disclosed in an embodiment of the present application;

FIG3 is a schematic diagram of a network architecture disclosed in an embodiment of the present application;

FIG4 is a flow chart of a communication method disclosed in an embodiment of the present application;

FIG5 is a flow chart of another communication method disclosed in an embodiment of the present application;

FIG6 is a schematic diagram of a first frame disclosed in an embodiment of the present application;

7 is a schematic diagram of a feedback result based on trigger frame reporting disclosed in an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a communication device disclosed in an embodiment of the present application;

FIG9 is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application.

DETAILED DESCRIPTION

The embodiments of the present application disclose a communication method, device and system for improving link adaptation efficiency, which are described in detail below.

In order to better understand the embodiments of the present application, the related technologies of the embodiments of the present application are described below.

WLAN has gone through many generations so far, such as 802.11a/b/g, 802.11n, 802.11ac, 802.11ax and 802.11be which is being discussed now. Among them, the 802.11n standard can be called high throughput (HT), the 802.11ac standard can be called very high throughput (VHT), 802.11ax (Wi-Fi 6) can be called high efficiency (HE), 802.11be (Wi-Fi 7) can be called extremely high throughput (EHT), and the standards before HT, such as 802.11a/b/g, can be collectively referred to as non-HT.

The physical layer in WLAN can transmit information through PPDU. The uplink/downlink field and PPDU type and compression mode field of EHT PPDU can be shown in Table 1:

Table 1

It can be seen from Table 1 that the format and compression mode of the EHT PPDU can be determined according to the uplink/downlink field and the PPDU type and compression mode field. It can be seen that the format of the EHT PPDU can be a multi-user (MU) PPDU or a trigger-based (TB) PPDU. Please refer to Figure 1, which is a schematic diagram of a MU PPDU disclosed in an embodiment of the present application. As shown in Figure 1, the MU PPDU may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signaling field (L-SIG), a legacy signaling field repeat (RL-SIG), a universal signaling field (U-SIG), an EHT signaling field (EHT signalfield A, EHT-SIG), an EHT short training field (EHT short training field, EHT-STF), an EHT long training field (EHT long training field, EHT-LTF), data (data) and a data packet extension (data expansion, PE). Please refer to Figure 2, which is a schematic diagram of a TB PPDU disclosed in an embodiment of the present application. As shown in Figure 2, the TB PPDU may include L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-STF, EHT-LTF, data and PE. It can be seen that when the format of the EHT PPDU is a TB PPDU, the EHT-SIG does not exist in the TB PPDU. The EHT-SIG may include a common field and a user-specific field. The common field may include a resource unit (RU) allocation subfield (RU allocation subfield), and the user-specific field may include a user field (user field). The resource unit allocation subfield is used to indicate the subcarrier (tone) allocation. It can be seen from Table 1 and Figures 1-2 that the resource unit allocation subfield may exist or not exist.

When the resource unit allocation subfield exists, that is, when the EHT-SIG exists, one resource unit allocation subfield may correspond to a frequency band with a bandwidth of 20 MHz. For example, when the bandwidth of the PPDU is 20 MHz, the EHT-SIG may include 1 resource unit allocation subfield. For another example, when the bandwidth of the PPDU is 40 MHz, the EHT-SIG may include 2 resource unit allocation subfields, which may respectively represent 2 20 MHz frequency bands from low to high frequencies. For another example, when the bandwidth of the PPDU is 160 MHz, the EHT-SIG may include 8 resource unit allocation subfields, which may respectively represent 8 20 MHz frequency bands from low to high frequencies. For another example, when the bandwidth of the PPDU is 320 MHz, the EHT-SIG may include 16 resource unit allocation subfields, which may respectively represent 16 20 MHz frequency bands from low to high frequencies.

When the resource unit allocation subfield exists, when the bandwidth of the PPDU is 20MHz, the EHT-SIG can be carried on a content channel (CC) for transmission. When the bandwidth of the PPDU is greater than or equal to 40MHz, the EHT-SIG can be carried on two CCs for parallel transmission, so that the EHT-SIG can be transmitted faster. For example, when the bandwidth of the PPDU is 160MHz, CC1 can carry the 1st, 3rd, 5th, and 7th 20MHz frequency bands marked from low to high, and CC2 can carry the 2nd, 4th, 6th, and 8th 20MHz frequency bands marked from low to high.

For each resource unit allocation subfield, the resource unit carried can be indicated by 9 bits in the EHT, which indicates the allocation of resource units on the corresponding 20MHz frequency band and the location of the resource units in the frequency. At the same time, it also indicates the number of user fields contributed by the resource unit allocation subfield on its corresponding content channel. In the case where more than one user field belongs to the same resource unit, these user fields are MU-multiple input multiple output (MIMO) user fields, indicating that the users on this RU have performed MU-MIMO operations.

When the subcarriers included in the resource unit are less than 242, that is, the resource unit is a small-size resource unit (smallsizeRU), each resource unit can only support one user. When the subcarriers included in the resource unit are greater than or equal to 242, that is, the resource unit is a large-size resource unit (largesize RU), each resource unit can support up to 8 users. The total number of users can be obtained by summing the number of user fields indicated by the resource unit allocation subfields corresponding to all 20MHz frequency bands corresponding to the resource unit. For example, when the resource unit includes 242 subcarriers, this resource unit corresponds to only one resource unit allocation subfield, and the number of user fields corresponding to this resource unit allocation subfield is the number of MU-MIMO users.

It should be noted that the order in which the user fields appear in the user-specific field is consistent with the order of RUs divided in the corresponding resource unit allocation subfield. The user can identify whether the user field belongs to him by reading the STA-ID in the user field. Combining the position of the user field with the corresponding resource unit allocation subfield, the user can know his RU allocation. The user here can be STA or AP.

When the resource unit allocation subfield does not exist and it is a non-NDP transmission, the PPDU can indicate the allocation of resource units through the Punctured Channel Information field in the U-SIG.

In the case where the resource unit allocation subfield does not exist and the NDP transmission is performed, the frequency band that the corresponding station needs to measure can be indicated by the partial bandwidth information (Partial BWInfo) subfield in the site information field in the NDP announcement (NDPA) frame that appears before the NDP, for the subsequent feedback of the compressed beamforming/channel quality indication frame. Since there is no data field in the NDP, it can be considered that there is no resource unit carrying data allocated to a certain station, and the resource unit allocated here can be understood as informing the corresponding station of the location of the frequency band that needs to be measured.

Link adaptation technology refers to the behavior of the system adaptively adjusting the system transmission parameters according to the currently acquired channel information, in order to overcome or adapt to the impact of the current channel changes. At present, in WLAN, the AP can first tentatively adjust the transmission parameters, and then use the adjusted transmission parameters for transmission, and then modify the transmission parameters according to information such as whether the ACK frame is received for the above transmission and the packet error rate of the above transmission.

Take the transmission parameter MCS as an example. The AP can make tentative adjustments to the MCS, and then adjust the MCS size based on information such as whether the ACK frame is received and the packet error rate. For example, if the transmission is always successful, the MCS level can be increased in subsequent transmissions to increase the transmission rate; if there is a transmission failure, the MCS level can be reduced in subsequent transmissions to increase the transmission robustness.

In the above method, multiple interactions may be required to converge the transmission parameters, thereby reducing the link adaptation efficiency.

In order to better understand a communication method, device and system disclosed in an embodiment of the present application, the network architecture used in the embodiment of the present application is described below. Please refer to Figure 3, which is a schematic diagram of a network architecture disclosed in an embodiment of the present application. The network structure may include one or more access point (AP) type sites and one or more non-access point type sites (none access point station, non-AP STA). For ease of description, the access point type site is referred to as an access point (AP) and the non-access point type site is referred to as a station (STA). Among them, the access point can be an access point for a terminal device (such as a mobile phone) to enter a wired (or wireless) network, which is mainly deployed in homes, buildings and parks, with a typical coverage radius of tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. The access point is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to Ethernet. Specifically, the access point can be a terminal device (such as a mobile phone) or a network device (such as a router) with a Wi-Fi chip. The access point can be a device that supports the 802.11be standard. The access point may also be a device that supports various wireless local area networks (WLAN) standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, and 802.11be next generation. The access point in this application may be a high-efficiency (HE) AP or an extremely high throughput (EHT) AP, or an access point applicable to a future generation of Wi-Fi standards.

The site can be a wireless communication chip, a wireless sensor or a wireless communication terminal, etc., and can also be called a user. For example, the site can be a mobile phone that supports Wi-Fi communication function, a tablet computer that supports Wi-Fi communication function, a set-top box that supports Wi-Fi communication function, a smart TV that supports Wi-Fi communication function, a smart wearable device that supports Wi-Fi communication function, a vehicle-mounted communication device that supports Wi-Fi communication function, and a computer that supports Wi-Fi communication function, etc. Optionally, the site can support the 802.11be standard. The site can also support multiple wireless local area networks (WLAN) standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, and 802.11be next generation.

The access point in this application may be a high efficiency (HE) STA or an extremely high throughput (EHT) STA, or may be a STA applicable to a future generation of Wi-Fi standards.

For example, access points and sites can be devices used in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras and smart remote controls in smart homes, smart water and electricity meters, and sensors in smart cities.

It should be noted that the network architecture shown in FIG. 3 is not limited to including only the APs and STAs shown in the figure, but may also include other APs and STAs not shown in the figure, which will not be listed one by one in this application.

The embodiment of the present application provides a communication method applied to a wireless communication system, the wireless communication system may be a wireless local area network (WLAN) or a cellular network, the method may be implemented by a communication device in the wireless communication system or a chip or processor in the communication device, the communication device may be a wireless communication device that supports multiple links for transmission in parallel, for example, a multi-link device or a multi-band device. Compared with a device that only supports single-link transmission, a multi-link device has higher transmission efficiency and higher throughput.

A multi-link device includes one or more affiliated stations STA (affiliated STA), and an affiliated STA is a logical station that can work on a link. Among them, the affiliated station can be an access point (Access Point, AP) or a non-access point station (non-Access Point Station, non-AP STA). For the convenience of description, this application will refer to a multi-link device whose affiliated station is AP as a multi-link AP or a multi-link AP device or an AP multi-link device (APmulti-link device), and a multi-link device whose affiliated station is a non-AP STA as a multi-link STA or a multi-link STA device or a STA multi-link device (STA multi-link device).

Based on the above network architecture, please refer to Figure 4, which is a flow chart of a communication method disclosed in an embodiment of the present application. As shown in Figure 4, the communication method may include the following steps.

401. A first communication device sends a first PPDU to a second communication device.

Accordingly, the second communication device receives the first PPDU from the first communication device.

The first communication device may send a first PPDU to the second communication device when link adaptation is required. The first PPDU may include indication information and M link adaptation blocks. The indication information may indicate resources used for link adaptation, and the resources are used to transmit M link adaptation blocks, that is, the indication information may indicate resources used to transmit M link adaptation blocks. The resources may be understood as frequency domain resources, which may correspond to RU (i.e., single RU), frequency band, multiple resource units (multiple RU, MRU), or other resources. The resources used for link adaptation may be understood as RUs used for link adaptation, frequency bands used for link adaptation, or MRUs used for link adaptation.

In the case where the resource corresponds to RU, the resource may include one RU or multiple RUs. The resource corresponding to RU may be understood as a resource in units of RU. The RU may be a 26-tone RU, a 52-tone RU, a 106-tone RU, a 242-tone RU, a 484-tone RU, a 996-tone RU, or a RU of other tones.

In the case where the resource corresponds to a frequency band, the resource may include one frequency band or multiple frequency bands. The resource corresponding to the frequency band may be understood as a resource in units of frequency bands. The frequency band may be 20 MHz, 40 MHz, 80 MHz, other integer multiples of 20 MHz, or other MHz frequency bands.

In the case where the resource corresponds to MRU, the resource may include one MRU or multiple MRUs. The resource corresponding to MRU may be understood as a resource in units of MRU. The MRU may be a 52-tone+26-tone MRU, a 106-tone+26-tone MRU, or an MRU including two or more tones.

The indication information may be one or more of the first bit, the first user field, the puncturing channel information field in the U-SIG, the resource unit allocation subfield, the bitmap, and the index of the MCS.

The first bit may be a validation bit, which is a reserved bit. In the existing protocol, subsequent interpretation may be stopped after the validation bit is found to be inconsistent. In the present application, after the validation bit is found to be inconsistent, not only may subsequent interpretation be stopped, but the first PPDU may also be indicated to be used for link adaptation. The first bit may also be a disregard bit, and interpretation continues regardless of whether the value of the disregard bit is 0 or 1, that is, the disregard bit is ignored. When the first bit is in the disregard bit, the disregard bit defined in the original protocol may be used to indicate that the first PPDU is used for link adaptation. For example, when the bit is 0, it indicates that the first PPDU is used for link adaptation, or, when the bit is 1, it indicates that the first PPDU is used for link adaptation. The first bit may be carried in the U-SIG, in the EHT-SIG, or in other parts of the first PPDU. For example, the first bit may be carried in the L-SIG.

The first user field and the second user field are both user fields, and both include STA-ID, but the STA-ID included in the first user field is a specific STA-ID, and the specific STA-ID is not the STA-ID indicating different types of communication devices (i.e., users) specified in the existing communication protocol. It can be understood that the STA-ID is a STA-ID not defined in the existing protocol. The STA-ID included in the second user field is the STA-ID of the communication device (i.e., user) used for link adaptation, that is, the STA-ID included in the second user field is not only the STA-ID of the communication device, but also the communication device is a communication device used for link adaptation. The STA-ID can include 11 bits, which can be a value from 0 to 2047. Since 0, 2045, 2046, and 2047 already have unique meanings, the specific STA-ID can be a value from 1 to 2044.

It should be understood that the first user field and the second user field are both user fields corresponding to the above resources.

In the case where the resource corresponds to an RU, the first user field may be located in the user field corresponding to the RU. The user field corresponding to the RU may be located in the content channel corresponding to the RU. The user field corresponding to an RU included in the resource may have one first user field or multiple first user fields. In the case where there is one first user field in the user field corresponding to an RU, the first user field may be located in the first user field corresponding to the RU, or in the last user field corresponding to the RU, or in other positions in the user field corresponding to the RU, such as in the middle user field corresponding to the RU. In the case where there are multiple first user fields in the user field corresponding to an RU, the multiple first user fields may be continuous, that is, adjacent, or may be discontinuous. The content channel corresponding to the RU may be one or multiple.

In addition, in order to improve resource utilization, the first user field may also include public information required by link adaptation users. Similarly, the second user field may also include configuration information for link adaptation of a single user. It can be seen that the public information included in the first user field can be used by multiple users for link adaptation, while the configuration information included in the second user field can only be used by one user for link adaptation. The public information in the first user field and the configuration information in the second user field may include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information, and measurement accuracy information. Spatial stream information may include the starting position and number of spatial streams. Beamforming information may include weight matrix information, etc. MCS information may include MCS configuration. Feedback type mode information may include information that needs to be fed back. Resource allocation information may include information on allocated resources. Power information may include information on power used for link adaptation. Measurement accuracy information may include the range of feedback results, etc. For example, the first user field may carry the public configuration of MCS, and the second user field corresponding to the second communication device may carry the MCS range measured by the second communication device, the MCS range fed back, etc.

For example, in the case where the user field includes MCS information, the user field may be as shown in Table 2:

Table 2

It should be understood that Table 2 is only an exemplary description of the user field and does not constitute a limitation on it. In the case where a longer user information field is required, information can be added by merging user fields. For example, the same two STA-IDs are used to indicate that the next user field still belongs to the user, so that a total of (22-11)*2=22 can be used for MCS indication, which can be used for more flexible MCS measurement indication. The MCS bitmap can be used to indicate the MCS used by the subsequent link adaptation block. 16 bits can be used to indicate the MCS used by the link adaptation block. These 16 bits can indicate the use of 16 MCSs from 0 to 15 in Table 3 from left to right. For example, when the value of the 16 bits is 1110001000000000, and there are four link adaptation blocks, if 1 indicates that it is used for link adaptation, it can indicate that the indexes of the MCSs used by the four link adaptation blocks are 0, 1, 2, and 6 respectively. Similarly, these 16 bits can also indicate the use of 16 MCSs from 0 to 15 in Table 3 from right to left. For example, when the 16-bit value is 1110001000000000, and there are four link adaptation blocks, if 1 indicates that it is used for link adaptation, it can indicate that the indexes of the MCS used by the four link adaptation blocks are 9, 13, 14, and 15, respectively. In addition, for the adjustment of the MCS, indication information for indicating the resource size occupied by a link adaptation block can also be carried. For example, this indication information can indicate that each link adaptation block occupies n orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.

Let's take beamforming as an example. Different link adaptation blocks can be beamformed differently. The second communication device can feedback which link adaptation block has a good reception effect. Another example can be given from the power perspective. The link adaptation block can be composed of multiple streams. The power allocated to each stream in different link adaptation blocks can be different. Similarly, the station can feedback which link adaptation block has a good reception effect.

The bitmap is a bit sequence composed of multiple bits. The bitmap can be located in (or carried on) U-SIG, or in (or carried on) EHT-SIG, or in (or carried on) other parts of the PPDU. When the first PPDU is used for both link adaptation and data transmission, the bitmap is used to indicate that the frequency band indicated by each bit in the bitmap is used for link adaptation or for data transmission, that is, the bitmap can not only indicate the frequency band used for link adaptation, but also indicate the frequency band used for data transmission. For example, the bitmap may include 16 bits. When the bandwidth of the first PPDU is 20MHz, only the first bit of the 16 bits may be a valid bit; when the bandwidth of the first PPDU is 40MHz, only the first two bits of the 16 bits may be before the valid bits; when the bandwidth of the first PPDU is 80MHz, only the first four bits of the 16 bits may be before the valid bits. It can be seen that 1 bit in the bitmap can correspond to a frequency band of 20MHz. For example, when the value of a valid bit is 0, the valid bit may indicate that the frequency band corresponding to the valid bit is used for link adaptation, and when the value of the valid bit is 1, the valid bit may indicate that the frequency band corresponding to the valid bit is used for data transmission. For another example, when the value of a valid bit is 1, the valid bit may indicate that the frequency band corresponding to the valid bit is used for link adaptation, and when the value of the valid bit is 0, the valid bit may indicate that the frequency band corresponding to the valid bit is used for data transmission. In the case where the first PPDU is only used for link adaptation, the bitmap may indicate the frequency band used for link adaptation. For example, when the values of the valid bits in the bitmap are all 0 (or 1), the bitmap may indicate that the first PPDU is only used for link adaptation. It should be understood that the above is only an exemplary description of the bitmap and does not constitute a limitation on the bitmap. For example, a bit in the bitmap may correspond to a frequency band of 40 MHz, a frequency band of 80 MHz, or other frequency bands that are integer multiples of 20 MHz. For another example, the bitmap may include 2 bits, 3 bits, 4 bits, or other numbers of bits.

Since some MCSs are not available in some cases, the indexes of these MCSs can be used to indicate them in the user field. The MCS in EHT can be shown in Table 3:

Table 3

For example, in OFDMA mode, the MCS may be MCS14.

As shown in Table 1, when the uplink/downlink field in the U-SIG field included in the first PPDU is 0, and the PPDU type and compression mode fields are 1, the transmission mode of the first PPDU can be a single-user transmission mode; when the uplink/downlink field in the U-SIG field included in the first PPDU is 1, and the PPDU type and compression mode fields are 1, the transmission mode of the first PPDU can be a single-user transmission mode; when the uplink/downlink field in the U-SIG field included in the first PPDU is 0, the PPDU type and compression mode fields are 0, and the total number of user fields is 1, the transmission mode of the first PPDU can be a single-user transmission mode. When the transmission mode of the first PPDU is the single-user transmission mode, the first PPDU includes only one user field. When the transmission mode of the first PPDU is the single-user transmission mode and the first PPDU is only used for link adaptation, this user field is the second user field. The above-mentioned resources correspond to this user field, that is, the above-mentioned resources are resources for link adaptation of the user corresponding to this user field. The original type of this user field is non-MU-MIMO type, but because the indication information indicates the resources used for link adaptation, that is, it indicates that the user corresponding to this user field performs link adaptation, the type of this user field is changed from non-MU-MIMO type to link adaptation type. Therefore, when the second communication device interprets this user field, it can interpret it according to the link adaptation type. At this time, the indication information has the following situations.

In one case, the indication information may be a perforation information field in the U-SIG. For example, when the perforation information field in the U-SIG is a first value, the perforation information field in the U-SIG may indicate resources used for link adaptation, which may be understood as the first PPDU being used for link adaptation, and the resources indicated by the first PPDU being resources used for link adaptation. When the SAT-ID of the communication device receiving the first PPDU is the same as the STA-ID included in the user field, if the communication device interprets that the perforation information field in the U-SIG is a first value, the second communication device may perform link adaptation using the resources indicated by the indication information.

In another case, the indication information may be the first bit. The first bit may indicate resources used for link adaptation, which may be understood as the first PPDU being used for link adaptation, and the resources indicated by the first PPDU being resources used for link adaptation. For example, when the first bit is 1, the first bit may indicate resources used for link adaptation. For another example, when the first bit is 0, the first bit may indicate resources used for link adaptation. It can be seen that one bit may be used to indicate that the first PPDU is used for link adaptation and the resources indicated by the first PPDU are resources used for link adaptation.

In another case, the indication information may also be the puncturing information field and the first bit in the U-SIG. For example, when the puncturing information field in the U-SIG is the second value and the first bit is 1 (or 0), resources used for link adaptation may be indicated.

The first PPDU may be sent in the form of a broadcast. In this case, the indication information may be a first user field. When the transmission mode of the first PPDU is a single-user transmission mode and the first PPDU is only used for link adaptation, all second communication devices that can receive the first PPDU may perform step 402 according to the first PPDU. When the transmission mode of the first PPDU is MU MIMO and the first PPDU is used for link adaptation and data transmission, in one case, the second communication device that is not allocated data among the second communication devices that can receive the first PPDU may perform step 402 according to the first PPDU; in another case, the second communication devices that can receive the first PPDU, except for the second communication device that is designated to perform link adaptation on a certain resource unit, may perform step 402 according to the first PPDU.

As shown in Table 1, when the uplink/downlink field in the U-SIG field included in the first PPDU is 0, and the PPDU type and compression mode fields are 0 or 2, the transmission mode of the first PPDU can be MU MIMO transmission mode. When the transmission mode of the first PPDU is MU MIMO transmission mode, the first PPDU may include multiple user fields. When the transmission mode of the first PPDU is MU MIMO transmission mode, and the first PPDU is only used for link adaptation, the above resources correspond to these multiple user fields. When the first PPDU does not include the first user field, these multiple user fields are all second user fields. When the first PPDU includes the first user field, the user fields except the first user field in these multiple user fields are all second user fields. The type of the original second user field is MU-MIMO type, but because the indication information indicates the resources used for link adaptation, that is, it indicates that the user corresponding to the second user field is used for link adaptation, the type of the second user field is changed from MU-MIMO type to link adaptation type. At this time, the indication information has the following situations.

In one case, the indication information may be a puncturing channel information field in the U-SIG. In another case, the indication information may be a first bit. In yet another case, the indication information may be a puncturing channel information field and a first bit in the U-SIG. For detailed descriptions of these cases, reference may be made to the above related descriptions.

In another case, the indication information may be a first user field. The first user field may indicate that the first PPDU is used for link adaptation, and the resources indicated by the first PPDU are resources used for link adaptation. For example, when the second communication device detects that the first PPDU includes a second user field corresponding to the second communication device and includes the first user field, the second communication device may perform step 402 according to the second user field corresponding to the second communication device and the RU corresponding to the second communication device.

In another case, the indication information may be the first user field and the perforation information field in the U-SIG. For example, when the first PPDU includes the first user field and the perforation information field in the U-SIG is the third value, the first user field and the perforation information field in the U-SIG may indicate resources for link adaptation.

It should be understood that, when the puncturing information field in the U-SIG includes 5 bits, the first value, the second value, and the third value may be values of 0 to 31. The channel puncturing mode indicated by the puncturing information field in the U-SIG in the existing protocol may be reused and indicated to perform link adaptation in the channel puncturing mode. It may be understood that the channel puncturing mode at this time may be regarded as indicating resources for link adaptation.

In another case, the indication information may also be the first bit and the first user field. For example, when the first PPDU includes the first user field and the bit corresponding to the first bit is 1 (or 0), the first bit and the first user field may indicate resources for link adaptation.

In yet another case, the indication information may be an index of the MCS. For example, when the index of the MCS is the fourth value, the index of the MCS may indicate resources used for link adaptation. In yet another case, the indication information may be an index of the MCS and a perforation information field in the U-SIG. In yet another case, the indication information may be an index of the MCS and a first bit. In yet another case, the indication information may be an index of the MCS and a first user field. In yet another case, the indication information may be a perforation information field, a first bit, and a first user field in the U-SIG. In yet another case, the indication information may be an index of the perforation information field, a first bit, and the MCS. In yet another case, the indication information may be a first bit, a first user field, and an index of the MCS. In yet another case, the indication information may be an index of the perforation information field, a first user field, and the MCS.

As shown in Table 1, when the uplink/downlink field in the U-SIG field included in the first PPDU is 0, and the PPDU type and compression mode fields are 0, the transmission mode of the first PPDU may be an OFDMA transmission mode. When the transmission mode of the first PPDU is the OFDMA transmission mode, the first PPDU may include one user field or multiple user fields. When the transmission mode of the first PPDU is the OFDMA transmission mode, and the first PPDU is used for link adaptation and data transmission, the above-mentioned resources may correspond to one user field or multiple user fields. When the first PPDU does not include the first user field, the user fields corresponding to the above-mentioned resources are all second user fields. When the first PPDU includes the first user field, the user fields corresponding to the above-mentioned resources except the first user field are all second user fields. The original type of the second user field is non-MU-MIMO type or MU MIMO type, but because the indication information indicates the resources used for link adaptation, the type of the second user field is changed from non-MU-MIMO type or MUMIMO type to link adaptation type. At this time, the indication information has the following situations.

In one case, the indication information may be a bitmap. The bitmap may indicate that the frequency band indicated by each bit in the bitmap is used for link adaptation or for data transmission. For detailed description, reference may be made to the above description of the bitmap.

In another case, the indication information may be a first user field. The first user field may indicate that the first PPDU is used for link adaptation, and may indicate that the RU corresponding to the first user field is a resource for link adaptation. It should be understood that the user field other than the first user field in the user field corresponding to the RU corresponding to the first user field is the second user field. For example, in the case where the RU corresponding to the first user field corresponds to two user fields, one of the two user fields is the first user field, which is used to indicate that the RU is used for link adaptation, and the other user field in the two user fields is the second user field.

In another case, the indication information may be a resource unit allocation subfield and a first user field. For example, the first user field may indicate that the first PPDU is used for link adaptation, and the resource unit allocation subfield may indicate resources used for link adaptation.

In another case, the indication information may also be a resource unit allocation subfield and a bitmap. The bitmap may coarsely indicate the frequency band used for link adaptation or for data transmission, and the resource unit allocation subfield may specifically indicate the resources used for link adaptation. For example, assuming that the bitmap includes 4 bits, each bit may correspond to an 80 MHz frequency band. If a 484-tone RU is allocated to a certain STA on the first 80 MHz frequency band for link adaptation, when 1 is used to indicate link adaptation, the bitmap may be 1000, and the bitmap may indicate that the first 80 MHz frequency band is used for link adaptation. The first 80 MHz frequency band corresponds to the first resource allocation subfield in the resource allocation subfield, and the first resource allocation subfield may indicate that the 484-tone RU is used for link adaptation. In another case, the indication information may also be a bitmap and a first user field. As one possibility, the first user field is used to indicate that the first PPDU is used for link adaptation, and the bitmap is used to indicate the resources used for link adaptation. Alternatively, the bitmap may coarsely indicate the frequency band used for link adaptation or for data transmission, and the first user field may specifically indicate the resources used for link adaptation. For example, assuming that the bitmap includes 4 bits, each bit may correspond to an 80 MHz frequency band, if a 484-tone RU is allocated to a certain STA on the first 80 MHz frequency band for link adaptation, and when 1 is used to indicate link adaptation, the bitmap may be 1000, and the bitmap may indicate that the first 80 MHz frequency band is used for link adaptation, and the first 80 MHz frequency band corresponds to the first resource allocation subfield in the resource allocation subfield, and the first user field may indicate that the 484-tone RU is used for link adaptation.

It should be understood that when the first PPDU does not include the first user field, the user fields corresponding to the resources indicated by the indication information are all second user fields. When the first PPDU includes the first user field, the user fields corresponding to the resources indicated by the indication information except the first user field are all second user fields. Therefore, when the above-mentioned resources correspond to RU, and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU (i.e., the total number of user fields) and the number of first user fields corresponding to the RU. The information carried by different second user fields can be the same or different.

It should be understood that the above tone can be replaced by a subcarrier.

It should be understood that the above interpretations of different indication information are only one or more exemplary explanations of the interpretation of indication information, and do not constitute a limitation on the interpretation of indication information. There may also be other interpretation methods.

Traditionally, only 1 to 8 user fields are supported on a resource unit. This is because too many user fields on this resource unit means that there are too many user fields for simultaneous MU-MIMO, and there is no need to support so many users. In the case of link adaptation, the number of user fields corresponding to the resource unit can actually be unlimited. Therefore, in this case, the number of user fields corresponding to the resource unit is equal to the sum of the number of user fields represented by all resource unit allocation subfields corresponding to the resource unit, and the value is allowed to be greater than 8.

The transmission parameters used by the M link adaptation blocks are different. The transmission parameters may include one or more of MCS, beamforming, measurement sequence, spatial stream and power. In the case where the transmission parameters include multiple ones, the different transmission parameters may be different for some transmission parameters or for all transmission parameters. For example, the first link adaptation block uses MCS1 and power 1, and the second link adaptation block uses MCS2 and power 1. For another example, the first link adaptation block uses MCS1 and power 1, and the second link adaptation block uses MCS2 and power 2. The above resources are used to transmit M link adaptation blocks, which can be understood as M link adaptation blocks being transmitted through the above resources. M is an integer greater than or equal to 1.

402. The second communication device sends a feedback result to the first communication device.

Correspondingly, the first communication device receives the feedback result from the second communication device.

The second communication device receives the first PPDU from the first communication device and can send a feedback result to the first communication device, where the feedback result can be determined based on the measurement results corresponding to the M link adaptation blocks. The feedback result can be fed back via the PPDU.

The second communication device may measure the M link adaptation blocks through the above resources, that is, may receive the M link adaptation blocks on the above resources and measure the M link adaptation blocks. The measurement may be one or more of reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), received signal strength indication (RSSI), signal to interference plus noise ratio (SINR), etc.

The second communication device may then determine a feedback result based on the measurement result. The second communication device may select one or more larger transmission parameters among RSRP, RSRQ, RSSI, SINR, etc. For example, one or more larger MCSs among RSRP, RSRQ, RSSI, SINR, etc. may be selected.

After the first communication device receives the feedback result from the second communication device, it can send a second PPDU to the second communication device according to the feedback result. Correspondingly, the second communication device receives the second PPDU from the first communication device. The second PPDU is a PPDU used for data transmission.

In one case, the first communication device and the second communication device may both be APs. In another case, the first communication device and the second communication device may both be STAs. In yet another case, the first communication device may be an AP and the second communication device may be a STA. In yet another case, the first communication device may be a STA and the second communication device may be an AP.

It should be understood that the second communication device can use the HE link adaptation (LA) (HE LA, HLA)-control feedback result in A-control.

It should be understood that the first PPDU may include M indication information and M link adaptation blocks, and the M indication information corresponds to the M link adaptation blocks one by one. One indication information among the M indication information may indicate the transmission resource of one link adaptation block among the M link adaptation blocks, that is, one indication information may indicate the transmission resource of one link adaptation block.

It should be understood that the above resources can be replaced by MRU from RU, and can also be replaced by frequency band from RU.

It should be understood that the first user field may indicate that the user field other than the first user field in the user field corresponding to the resource is the second user field, that is, the user field used for link adaptation, while the first user field itself is not used for link adaptation.

Based on the above network architecture, please refer to Figure 5, which is a flow chart of another communication method disclosed in an embodiment of the present application. As shown in Figure 5, the communication method may include the following steps.

501. The first communication device sends a first frame to the second communication device.

Accordingly, the second communication device receives the first frame from the first communication device.

When link adaptation is required, the first communication device may first send a first frame to the second communication device. The first frame may indicate resources used for link adaptation in the PPDU, that is, may indicate resources used for link adaptation in the next transmitted PPDU, that is, may indicate resources used for link adaptation in the PPDU spaced by a short interframe space (SIFS) from the first frame. A detailed description of the resources may refer to step 401.

Please refer to FIG. 6, which is a schematic diagram of a first frame disclosed in an embodiment of the present application. As shown in FIG. 6, the first frame may include a common field and a station information field (STA information (Info) field). The number of station information fields may be one or more. The station information field may include a partial bandwidth information subfield.

It should be understood that Fig. 6 is only an exemplary description of the first frame and does not limit the first frame. For example, the first frame may also include one or more fields of a frame control field, a duration field, a receive address field, a transmit address field, a frame check sequence (FCS) field, etc.

In one case, different communication devices may be indicated by partial bandwidth information subfields in the site information fields corresponding to different communication devices. That is, the first frame may include a site information field, and the site information field may include partial bandwidth information subfields, and the partial bandwidth subfields may indicate the resources used for link adaptation by the site corresponding to the site information field. The site information field with the above indication function may be one or more. A second communication device that can receive the first frame and in which the first frame includes the corresponding site information field can perform step 503 according to the first frame and the first PPDU. In the case where the first frame does not include the corresponding site information field, the second communication device cannot perform step 503 according to the first frame and the first PPDU.

In another case, different communication devices may be indicated by a common field. The first frame may include a common field, which may indicate resources used for link adaptation in the PPDU. The second communication devices that can receive the first frame may perform step 503 according to the first frame and the first PPDU.

502. The first communication device sends a first PPDU to the second communication device.

Accordingly, the second communication device receives the first PPDU from the first communication device.

The first PPDU includes M link adaptation blocks, the transmission parameters used by the M link adaptation blocks are different, and resources are used to transmit the M link adaptation blocks. Since the first frame has indicated the resources used for link adaptation, the resource unit allocation subfield of the first PPDU does not need to carry indication information specifically used to indicate link adaptation. At this time, the resource unit allocation subfield corresponding to the above resources in the first PPDU indicates a corresponding 0 user field.

For example, when the second 20MHz band of the first PPDU is used for link adaptation, the resource unit allocation subfield corresponding to the 20MHz band in the first PPDU can be represented by 242(0). Among them, 242(0) indicates that there is no corresponding user field for the resource unit, which can be considered as a deceptive operation. In EHT, there are three types of indexes corresponding to 0 user fields, one indicating that the channel corresponds to 0 user fields because the channel is punctured, another indicating that the user is not allocated so the user field corresponds to 0, and another indicating that the corresponding content channel contributes 0 user fields. It is not limited to which indication corresponding to the 0 user field is used.

The first PPDU may further include indication information for indicating that the first PPDU is used for data transmission.

For other related detailed descriptions, please refer to the related description in step 401.

503. The second communication device sends a feedback result to the first communication device.

Correspondingly, the first communication device receives the feedback result from the second communication device.

The second communication device receives the first frame and the first PPDU from the first communication device, and can send a feedback result to the first communication device, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks. The feedback result can be transmitted via the PPDU.

For other related detailed descriptions, please refer to the related description in step 402.

In one case, after the second communication device determines the feedback result, it can directly send the feedback result to the first communication device. In another case, after the second communication device determines the feedback result, after receiving a trigger frame for triggering link adaptation from the first communication device, the second communication device can send the feedback result to the first communication device.

Please refer to Figure 7, which is a schematic diagram of a feedback result based on a trigger frame report disclosed in an embodiment of the present application. As shown in Figure 7, after the STA for data transmission receives the first frame and the first PPDU, the STA can directly respond; after the STA for link adaptation receives the first frame and the first PPDU, it is necessary to wait until a trigger frame from the AP is received, and then the STA can respond. It should be understood that the above example of triggering the reporting of feedback results through a trigger frame is only an exemplary explanation and does not constitute a limitation.

It should be understood that there is no limitation on the process of feeding back the feedback result after the second communication device receives the first PPDU.

It should be understood that the above operations in various modes are only examples and are not limited to being used in a certain mode or PPDU. The general idea is that the transmitting device uses the indication information to indicate that the type of the user field (except the first user field) corresponding to the resource indicated by the receiving device is the link adaptation type.

It should be understood that the functions performed by the first communication device in the above communication method can also be performed by a module (e.g., chip) in the first communication device, and the functions performed by the second communication device in the above communication method can also be performed by a module (e.g., chip) in the second communication device.

Based on the above network architecture, please refer to FIG8 , which is a schematic diagram of the structure of a communication device disclosed in an embodiment of the present application. As shown in FIG8 , the communication device may include a receiving unit 801 and a sending unit 802 .

In one case, the communication device may be a first communication device, or a module (eg, a chip) in the first communication device.

A sending unit 802 is configured to send a first PPDU, where the first PPDU includes indication information and M link adaptation blocks, where the indication information indicates resources used for link adaptation, the M link adaptation blocks use different transmission parameters, and the resources are used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The receiving unit 801 is configured to receive a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In one embodiment, the sending unit 802 is further configured to send a second PPDU according to the feedback result.

In one embodiment, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field, the perforation channel information field in the U-SIG, the RU allocation subfield, the bitmap, and the index of the MCS. The first bit can be a verification bit or an ignore bit. The bitmap can be carried in the U-SIG or in the EHT-SIG. The STA-ID included in the first user field is a specific STA-ID, and the MCS is not available in the OFDMA transmission mode.

In an embodiment, the bitmap may indicate whether the frequency band indicated by each bit in the bitmap is used for link adaptation or for data transmission.

In one embodiment, when the resource corresponds to an RU, the first user field is located at the first user field in the user fields corresponding to the RU, and the user fields corresponding to the RU are located at the content channel corresponding to the RU.

In one embodiment, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information, and measurement accuracy information.

In one embodiment, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

In one embodiment, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

A more detailed description of the receiving unit 801 and the sending unit 802 can be directly obtained by referring to the relevant description of the first communication device in the method embodiment shown in FIG. 4 , and will not be repeated here.

In another case, the communication device may be a first communication device, or a module (eg, a chip) in the first communication device.

A sending unit 802 is configured to send a first frame, where the first frame is used to indicate resources for link adaptation in the PPDU;

The sending unit 802 is further used to send a first PPDU, the first PPDU includes M link adaptation blocks, the M link adaptation blocks use different transmission parameters, the resource is used to transmit the M link adaptation blocks, and M is an integer greater than or equal to 1.

In one embodiment, the receiving unit 801 is configured to receive a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks;

The sending unit 802 is further configured to send a second PPDU according to the feedback result, where the second PPDU is used for data transmission.

In one embodiment, the first frame may include a site information field, the site information field may include a partial bandwidth information subfield, and the partial bandwidth subfield may indicate resources used for link adaptation by the site corresponding to the site information field.

In one embodiment, the first frame may include a common field, which may indicate resources used for link adaptation in the PPDU.

In one embodiment, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

A more detailed description of the receiving unit 801 and the sending unit 802 can be directly obtained by referring to the relevant description of the first communication device in the method embodiment shown in FIG. 5 , and will not be repeated here.

Based on the above network architecture, please refer to Figure 9, which is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application. As shown in Figure 9, the communication device may include a receiving unit 901 and a sending unit 902. The communication device may also include a measuring unit 903 and a determining unit 904.

In one case, the communication device may be a second communication device, or a module (eg, a chip) in the second communication device.

A receiving unit 901 is configured to receive a first PPDU, where the first PPDU includes indication information and M link adaptation blocks, where the indication information indicates resources used for link adaptation, where the M link adaptation blocks use different transmission parameters, and where the resources are used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The sending unit 902 is used to send a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In one embodiment, the measuring unit 903 is configured to measure the M link adaptation blocks using the resource;

The determining unit 904 is configured to determine a feedback result according to the measurement result.

In one embodiment, the indication information may be carried in one or more of the following:

One or more of the first bit, the first user field, the perforation channel information field in the U-SIG, the RU allocation subfield, the bitmap, and the index of the MCS. The first bit can be a verification bit or an ignore bit. The bitmap can be carried in the U-SIG or in the EHT-SIG. The STA-ID included in the first user field is a specific STA-ID, and the MCS is not available in the OFDMA transmission mode.

In an embodiment, the bitmap may indicate whether the frequency band indicated by each bit in the bitmap is used for link adaptation or for data transmission.

In one embodiment, when the resource corresponds to an RU, the first user field is located at the first user field in the user fields corresponding to the RU, and the user fields corresponding to the RU are located at the content channel corresponding to the RU.

In one embodiment, the first user field may also include one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information, and measurement accuracy information.

In one embodiment, when the resource corresponds to an RU and the number of user fields corresponding to the RU is greater than 1, the number of second user fields corresponding to the RU is the difference between the number of user fields corresponding to the RU and the number of first user fields corresponding to the RU, and the STA-ID included in the second user field is the STA-ID of the communication device used for link adaptation.

In one embodiment, the transmission parameters include one or more of MCS, beamforming, measurement sequence, spatial stream and power.

A more detailed description of the receiving unit 901, the sending unit 902, the measuring unit 903 and the determining unit 904 can be directly obtained by referring to the relevant description of the second communication device in the method embodiment shown in FIG. 4, and will not be repeated here.

In another case, the communication device may be a second communication device, or a module (eg, a chip) in the second communication device.

The receiving unit 901 is configured to receive a first frame, where the first frame indicates resources used for link adaptation in the PPDU;

The receiving unit 901 is further used to receive a first PPDU, where the first PPDU includes M link adaptation blocks, where the M link adaptation blocks use different transmission parameters, and the resource is used to transmit the M link adaptation blocks, where M is an integer greater than or equal to 1;

The sending unit 902 is used to send a feedback result, where the feedback result is determined according to the measurement results corresponding to the M link adaptation blocks.

In one embodiment, the measuring unit 903 is configured to measure the M link adaptation blocks using the resource;

The determining unit 904 is configured to determine a feedback result according to the measurement result.

In one embodiment, the first frame may include a site information field, the site information field may include a partial bandwidth information subfield, and the partial bandwidth subfield may indicate resources used for link adaptation by the site corresponding to the site information field.

In one embodiment, the first frame may include a common field, which may indicate resources used for link adaptation in the PPDU.

In one embodiment, the resource unit allocation subfield corresponding to the resource in the first PPDU indicates a corresponding 0 user field.

A more detailed description of the receiving unit 901, the sending unit 902, the measuring unit 903 and the determining unit 904 can be directly obtained by referring to the relevant description of the second communication device in the method embodiment shown in FIG. 5, and will not be repeated here.

It should be understood that the above-mentioned units can be independent or integrated. For example, the receiving unit and the unit can be independent or integrated into a transceiver unit. For another example, the measuring unit and the determining unit can be independent or integrated into a processing unit.

Based on the above network architecture, please refer to Figure 10, which is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application. As shown in Figure 10, the communication device may include a processor 1001, a memory 1002, a transceiver 1003 and a bus 1004. The memory 1002 may exist independently and may be connected to the processor 1001 via the bus 1004. The memory 1002 may also be integrated with the processor 1001. Among them, the bus 1004 is used to realize the connection between these components. In one case, as shown in Figure 10, the transceiver 1003 may include a transmitter 10031, a receiver 10032 and an antenna 10033. In another case, the transceiver 1003 may include a transmitter (i.e., an output interface) and a receiver (i.e., an input interface). The transmitter may include a transmitter and an antenna, and the receiver may include a receiver and an antenna.

The communication device may be a first communication device or a module in the first communication device. When the computer program instructions stored in the memory 1002 are executed, the processor 1001 is used to control the receiving unit 801 and the sending unit 802 to perform the operations performed in the above embodiment, and the transceiver 1003 is used to perform the operations performed by the receiving unit 801 and the sending unit 802 in the above embodiment. The above communication device may also be used to perform various methods performed by the first communication device in the above-mentioned method embodiments of Figures 4-5, which will not be described in detail.

The communication device may be a second communication device or a module in the second communication device. When the computer program instructions stored in the memory 1002 are executed, the processor 1001 is used to control the receiving unit 901 and the sending unit 902 to perform the operations performed in the above embodiment. The processor 1001 is also used to perform the operations performed by the measuring unit 903 and the determining unit 904 in the above embodiment. The transceiver 1003 is used to perform the operations performed by the receiving unit 901 and the sending unit 902 in the above embodiment. The above communication device can also be used to execute various methods performed by the second communication device in the above-mentioned method embodiments of Figures 4-5, which will not be repeated.

Based on the above network architecture, please refer to Figure 11, which is a schematic diagram of the structure of another communication device disclosed in an embodiment of the present application. As shown in Figure 11, the communication device may include an input interface 1101, a logic circuit 1102 and an output interface 1103. The input interface 1101 is connected to the output interface 1103 through the logic circuit 1102. Among them, the input interface 1101 is used to receive information from other communication devices, and the output interface 1103 is used to output, schedule or send information to other communication devices. The logic circuit 1102 is used to perform operations other than the operations of the input interface 1101 and the output interface 1103, such as implementing the functions implemented by the processor 1001 in the above embodiment. Among them, the communication device can be a terminal device (or a module in a terminal device), or it can be a network device (or a module in a network device). Among them, a more detailed description of the input interface 1101, the logic circuit 1102 and the output interface 1103 can be directly obtained by referring to the relevant description of the first communication device or the second communication device in the above method embodiment, and no further description is given here.

It should be understood that the above modules can be independent or integrated. For example, the transmitter, receiver and antenna can be independent or integrated into a transceiver. For another example, the input interface and the output interface can be independent or integrated into a communication interface.

The embodiment of the present application also discloses a computer-readable storage medium having instructions stored thereon, and when the instructions are executed, the method in the above method embodiment is executed.

The embodiment of the present application also discloses a computer program product including computer instructions, which, when executed, executes the method in the above method embodiment.

The embodiment of the present application also discloses a communication system, which may include a centralized controller, a routing calculator and a routing executor. For a specific description, reference may be made to the communication method shown in FIG. 4-FIG . 5 .

The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation methods of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the scope of protection of the present application.

Claims (23)

1. A method of communication, comprising:

sending a first physical layer protocol data unit (PPDU), wherein the first PPDU comprises indication information and M link adaptation blocks, the indication information indicates resources used for link adaptation, the M link adaptation blocks use different transmission parameters, the resources are used for transmitting the M link adaptation blocks, and M is an integer greater than or equal to 1;

and receiving a feedback result, wherein the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

2. A method of communication, comprising:

receiving a first physical layer protocol data unit (PPDU), wherein the first PPDU comprises indication information and M link adaptation blocks, the indication information indicates resources used for link adaptation, the M link adaptation blocks use different transmission parameters, the resources are used for transmitting the M link adaptation blocks, and M is an integer greater than or equal to 1;

and sending a feedback result, wherein the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

3. A communications apparatus, comprising:

a sending unit, configured to send a first physical layer protocol data unit PPDU, where the first PPDU includes indication information and M link adaptation blocks, where the indication information indicates a resource used for link adaptation, the M link adaptation blocks use different transmission parameters, the resource is used for transmitting the M link adaptation blocks, and M is an integer greater than or equal to 1;

and the receiving unit is used for receiving a feedback result, and the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

4. A communications apparatus, comprising:

a receiving unit, configured to receive a first physical layer protocol data unit PPDU, where the first PPDU includes indication information and M link adaptation blocks, where the indication information indicates a resource used for link adaptation, where transmission parameters used by the M link adaptation blocks are different, the resource is used for transmitting the M link adaptation blocks, and M is an integer greater than or equal to 1;

and the sending unit is used for sending a feedback result, and the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

5. The method of claim 1 or 2, or the apparatus of claim 3 or 4, wherein the indication information is carried in one or more of:

the method comprises the steps of obtaining a first bit, a first user field userfield, one or more of a puncture information field in a universal signaling field U-SIG, a resource unit allocation sub-field, a bitmap and an index of a modulation and coding strategy MCS, wherein the first bit is an authentication bit validatabit or an irrational bit dismgard bit, the bitmap is carried in the U-SIG or an EHT-SIG, and a station identification STA-ID included in the first user field is a specific STA-ID.

6. The method or apparatus of claim 5, wherein the bitmap is used to indicate frequency bands indicated by bits in the bitmap for link adaptation or data transmission.

7. The method or apparatus of claim 5, wherein in the case that the resource corresponds to a Resource Unit (RU), the first user field is located in a first user field of the user fields corresponding to the RU, and the user fields corresponding to the RU are located in a content channel corresponding to the RU.

8. The method or apparatus of any of claims 5-7, wherein the first user field further comprises one or more of spatial stream information, beamforming information, MCS information, feedback type mode information, measurement sequence information, resource allocation information, power information, and measurement accuracy information.

9. The method or apparatus of any of claims 5-8, wherein in a case that the resource corresponds to an RU, and the number of RU-corresponding user fields is greater than 1, the number of RU-corresponding second user fields is the difference between the number of RU-corresponding user fields and the number of RU-corresponding first user fields, and the second user fields include STA-IDs that are STA-IDs of communication devices used for link adaptation.

10. The method of any one of claims 1, 2, 5-9, or the apparatus of any one of claims 3-9, wherein the transmission parameters include one or more of MCS, beamforming, measurement sequences, spatial streams, and power.

11. A method of communication, comprising:

sending a first frame, wherein the first frame is used for indicating resources used for link adaptation in a physical layer protocol data unit (PPDU);

and sending a first PPDU, wherein the first PPDU comprises M link adaptive blocks, the M link adaptive blocks use different transmission parameters, the resource is used for transmitting the M link adaptive blocks, and M is an integer greater than or equal to 1.

12. A method of communication, comprising:

receiving a first frame indicating resources for link adaptation in a physical layer protocol data unit (PPDU);

receiving a first PPDU, wherein the first PPDU comprises M link adaptive blocks, the M link adaptive blocks use different transmission parameters, the resource is used for transmitting the M link adaptive blocks, and M is an integer greater than or equal to 1;

and sending a feedback result, wherein the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

13. A communications apparatus, comprising:

a sending unit, configured to send a first frame, where the first frame is used to indicate a resource for link adaptation in a physical layer protocol data unit PPDU;

the sending unit is further configured to send a first PPDU, where the first PPDU includes M link adaptation blocks, where transmission parameters used by the M link adaptation blocks are different, the resource is used to transmit the M link adaptation blocks, and M is an integer greater than or equal to 1.

14. A communications apparatus, comprising:

a receiving unit, configured to receive a first frame, where the first frame indicates a resource for link adaptation in a physical layer protocol data unit PPDU;

the receiving unit is further configured to receive a first PPDU, where the first PPDU includes M link adaptation blocks, where transmission parameters used by the M link adaptation blocks are different, the resource is used to transmit the M link adaptation blocks, and M is an integer greater than or equal to 1;

and the sending unit is used for sending a feedback result, and the feedback result is determined according to the measurement results corresponding to the M link self-adaptive blocks.

15. The method of claim 11 or 12, or the apparatus of claim 13 or 14, wherein the first frame comprises a station information field comprising a partial bandwidth information subfield indicating resources used by a station to which the station information field corresponds for link adaptation.

16. The method of claim 11 or 12, or the apparatus of claim 13 or 14, wherein the first frame comprises a common field indicating resources in a PPDU for link adaptation.

17. The method of any one of claims 11, 12, 15-16, or the apparatus of any one of claims 13-16, wherein the resource unit allocation subfield indication corresponding to the resource in the first PPDU corresponds to 0 user field.

18. A communications device comprising a processor, a memory, the processor and memory coupled, the processor invoking a computer program stored in the memory to implement the method of any of claims 1, 5-10, or the method of any of claims 11, 15-17.

19. A communications device comprising a processor, a memory, the processor and memory coupled, the processor invoking a computer program stored in the memory to implement the method of any one of claims 2, 5-10, or the method of any one of claims 12, 15-17.

20. A communication system comprising an apparatus according to claim 18 and an apparatus according to claim 19.

21. A computer-readable storage medium, in which a computer program or computer instructions are stored which, when executed, implement the method of any one of claims 1-2, 5-10, 11-12, 15-17.

22. A computer program product, characterized in that the computer program product comprises computer program code which, when executed, implements the method according to any one of claims 1-2, 5-10, 11-12, 15-17.

23. A chip comprising a processor for executing a program stored in a memory, which program, when executed, causes the chip to perform the method of any of claims 1-2, 5-10, 11-12, 15-17.

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